mcs/class/System.Web/System.Web.Configuration_2.0/WebConfigurationManager.cs

   1 //
   2 // System.Web.Configuration.WebConfigurationManager.cs
   3 //
   4 // Authors:
   5 //      Lluis Sanchez Gual (lluis@novell.com)
   6 //      Chris Toshok (toshok@ximian.com)
   7 //      Marek Habersack <mhabersack@novell.com>
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28 // Copyright (C) 2005-2009 Novell, Inc (http://www.novell.com)
  29 //
  30
  31 #if NET_2_0
  32
  33 using System;
  34 using System.IO;
  35 using System.Collections;
  36 using System.Collections.Generic;
  37 using System.Collections.Specialized;
  38 using System.Reflection;
  39 #if MONOWEB_DEP
  40 using Mono.Web.Util;
  41 #endif
  42 using System.Xml;
  43 using System.Configuration;
  44 using System.Configuration.Internal;
  45 using _Configuration = System.Configuration.Configuration;
  46 using System.Web.Util;
  47 using System.Threading;
  48 using System.Web.Hosting;
  49
  50 namespace System.Web.Configuration {
  51
  52         public static class WebConfigurationManager
  53         {
  54                 sealed class ConfigPath
  55                 {
  56                         public string Path;
  57                         public bool InAnotherApp;
  58
  59                         public ConfigPath (string path, bool inAnotherApp)
  60                         {
  61                                 this.Path = path;
  62                                 this.InAnotherApp = inAnotherApp;
  63                         }
  64                 }
  65
  66                 const int SAVE_LOCATIONS_CHECK_INTERVAL = 6000; // milliseconds
  67                 const int SECTION_CACHE_LOCK_TIMEOUT = 200; // milliseconds
  68
  69                 static readonly char[] pathTrimChars = { '/' };
  70                 static readonly object suppressAppReloadLock = new object ();
  71                 static readonly object saveLocationsCacheLock = new object ();
  72
  73                 // See comment for the cacheLock field at top of System.Web.Caching/Cache.cs
  74                 static readonly ReaderWriterLockSlim sectionCacheLock;
  75
  76 #if !TARGET_J2EE
  77                 static IInternalConfigConfigurationFactory configFactory;
  78                 static Hashtable configurations = Hashtable.Synchronized (new Hashtable ());
  79                 static Hashtable configPaths = Hashtable.Synchronized (new Hashtable ());
  80                 static bool suppressAppReload;
  81 #else
  82                 const string AppSettingsKey = "WebConfigurationManager.AppSettings";
  83
  84                 static internal IInternalConfigConfigurationFactory configFactory
  85                 {
  86                         get{
  87                                 IInternalConfigConfigurationFactory factory = (IInternalConfigConfigurationFactory)AppDomain.CurrentDomain.GetData("WebConfigurationManager.configFactory");
  88                                 if (factory == null){
  89                                         lock (AppDomain.CurrentDomain){
  90                                                 object initialized = AppDomain.CurrentDomain.GetData("WebConfigurationManager.configFactory.initialized");
  91                                                 if (initialized == null){
  92                                                         PropertyInfo prop = typeof(ConfigurationManager).GetProperty("ConfigurationFactory", BindingFlags.Static | BindingFlags.NonPublic);
  93                                                         if (prop != null){
  94                                                                 factory = prop.GetValue(null, null) as IInternalConfigConfigurationFactory;
  95                                                                 configFactory = factory;
  96                                                         }
  97                                                 }
  98                                         }
  99                                 }
 100                                 return factory != null ? factory : configFactory;
 101                         }
 102                         set{
 103                                 AppDomain.CurrentDomain.SetData("WebConfigurationManager.configFactory", value);
 104                                 AppDomain.CurrentDomain.SetData("WebConfigurationManager.configFactory.initialized", true);
 105                         }
 106                 }
 107
 108                 static internal Hashtable configurations
 109                 {
 110                         get{
 111                                 Hashtable table = (Hashtable)AppDomain.CurrentDomain.GetData("WebConfigurationManager.configurations");
 112                                 if (table == null){
 113                                         lock (AppDomain.CurrentDomain){
 114                                                 object initialized = AppDomain.CurrentDomain.GetData("WebConfigurationManager.configurations.initialized");
 115                                                 if (initialized == null){
 116                                                         table = Hashtable.Synchronized (new Hashtable (StringComparer.OrdinalIgnoreCase));
 117                                                         configurations = table;
 118                                                 }
 119                                         }
 120                                 }
 121                                 return table != null ? table : configurations;
 122
 123                         }
 124                         set{
 125                                 AppDomain.CurrentDomain.SetData("WebConfigurationManager.configurations", value);
 126                                 AppDomain.CurrentDomain.SetData("WebConfigurationManager.configurations.initialized", true);
 127                         }
 128                 }
 129
 130                 static Dictionary <int, object> sectionCache
 131                 {
 132                         get
 133                         {
 134                                 Dictionary <int, object> sectionCache = AppDomain.CurrentDomain.GetData ("sectionCache") as Dictionary <int, object>;
 135                                 if (sectionCache == null) {
 136                                         sectionCache = new Dictionary <int, object> ();
 137                                         AppDomain.CurrentDomain.SetData ("sectionCache", sectionCache);
 138                                 }
 139                                 return sectionCache;
 140                         }
 141                         set
 142                         {
 143                                 AppDomain.CurrentDomain.SetData ("sectionCache", value);
 144                         }
 145                 }
 146
 147                 static internal Hashtable configPaths
 148                 {
 149                         get{
 150                                 Hashtable table = (Hashtable)AppDomain.CurrentDomain.GetData("WebConfigurationManager.configPaths");
 151                                 if (table == null){
 152                                         lock (AppDomain.CurrentDomain){
 153                                                 object initialized = AppDomain.CurrentDomain.GetData("WebConfigurationManager.configPaths.initialized");
 154                                                 if (initialized == null){
 155                                                         table = Hashtable.Synchronized (new Hashtable (StringComparer.OrdinalIgnoreCase));
 156                                                         configPaths = table;
 157                                                 }
 158                                         }
 159                                 }
 160                                 return table != null ? table : configPaths;
 161
 162                         }
 163                         set{
 164                                 AppDomain.CurrentDomain.SetData("WebConfigurationManager.configPaths", value);
 165                                 AppDomain.CurrentDomain.SetData("WebConfigurationManager.configPaths.initialized", true);
 166                         }
 167                 }
 168 #endif
 169                 static Dictionary <string, DateTime> saveLocationsCache;
 170                 static Timer saveLocationsTimer;
 171
 172                 static ArrayList extra_assemblies = null;
 173                 static internal ArrayList ExtraAssemblies {
 174                         get {
 175                                 if (extra_assemblies == null)
 176                                         extra_assemblies = new ArrayList();
 177                                 return extra_assemblies;
 178                         }
 179                 }
 180
 181                 static bool hasConfigErrors = false;
 182                 static object hasConfigErrorsLock = new object ();
 183                 static internal bool HasConfigErrors {
 184                         get {
 185                                 lock (hasConfigErrorsLock) {
 186                                         return hasConfigErrors;
 187                                 }
 188                         }
 189                 }
 190
 191                 const int DEFAULT_SECTION_CACHE_SIZE = 100;
 192                 const string CACHE_SIZE_OVERRIDING_KEY = "MONO_ASPNET_WEBCONFIG_CACHESIZE";
 193                 static LruCache<int, object> sectionCache;
 194
 195                 static WebConfigurationManager ()
 196                 {
 197                         var section_cache_size = DEFAULT_SECTION_CACHE_SIZE;
 198                         int section_cache_size_override;
 199                         bool size_overriden = false;
 200                         if (int.TryParse (Environment.GetEnvironmentVariable (CACHE_SIZE_OVERRIDING_KEY), out section_cache_size_override)) {
 201                                 section_cache_size = section_cache_size_override;
 202                                 size_overriden = true;
 203                                 Console.WriteLine ("WebConfigurationManager's LRUcache Size overriden to: {0} (via {1})", section_cache_size_override, CACHE_SIZE_OVERRIDING_KEY);
 204                         }
 205                         sectionCache = new LruCache<int, object> (section_cache_size);
 206                         string eviction_warning = "WebConfigurationManager's LRUcache evictions count reached its max size";
 207                         if (!size_overriden)
 208                                 eviction_warning += String.Format ("{0}Cache Size: {1} (overridable via {2})",
 209                                                                    Environment.NewLine, section_cache_size, CACHE_SIZE_OVERRIDING_KEY);
 210                         sectionCache.EvictionWarning = eviction_warning;
 211
 212                         configFactory = ConfigurationManager.ConfigurationFactory;
 213                         _Configuration.SaveStart += ConfigurationSaveHandler;
 214                         _Configuration.SaveEnd += ConfigurationSaveHandler;
 215
 216                         // Part of fix for bug #491531
 217                         Type type = Type.GetType ("System.Configuration.CustomizableFileSettingsProvider, System", false);
 218                         if (type != null) {
 219                                 FieldInfo fi = type.GetField ("webConfigurationFileMapType", BindingFlags.Static | BindingFlags.NonPublic);
 220                                 if (fi != null && fi.FieldType == Type.GetType ("System.Type"))
 221                                         fi.SetValue (null, typeof (ApplicationSettingsConfigurationFileMap));
 222                         }
 223
 224                         sectionCacheLock = new ReaderWriterLockSlim ();
 225                 }
 226
 227                 static void ReenableWatcherOnConfigLocation (object state)
 228                 {
 229                         string path = state as string;
 230                         if (String.IsNullOrEmpty (path))
 231                                 return;
 232
 233                         DateTime lastWrite;
 234                         lock (saveLocationsCacheLock) {
 235                                 if (!saveLocationsCache.TryGetValue (path, out lastWrite))
 236                                         lastWrite = DateTime.MinValue;
 237                         }
 238
 239                         DateTime now = DateTime.Now;
 240                         if (lastWrite == DateTime.MinValue || now.Subtract (lastWrite).TotalMilliseconds >= SAVE_LOCATIONS_CHECK_INTERVAL) {
 241                                 saveLocationsTimer.Dispose ();
 242                                 saveLocationsTimer = null;
 243                                 HttpApplicationFactory.EnableWatcher (VirtualPathUtility.RemoveTrailingSlash (HttpRuntime.AppDomainAppPath), "?eb.?onfig");
 244                         } else
 245                                 saveLocationsTimer.Change (SAVE_LOCATIONS_CHECK_INTERVAL, SAVE_LOCATIONS_CHECK_INTERVAL);
 246                 }
 247
 248                 static void ConfigurationSaveHandler (_Configuration sender, ConfigurationSaveEventArgs args)
 249                 {
 250                         try {
 251                                 sectionCacheLock.EnterWriteLock ();
 252                                 sectionCache.Clear ();
 253                         } finally {
 254                                 sectionCacheLock.ExitWriteLock ();
 255                         }
 256
 257                         lock (suppressAppReloadLock) {
 258                                 string rootConfigPath = WebConfigurationHost.GetWebConfigFileName (HttpRuntime.AppDomainAppPath);
 259                                 if (String.Compare (args.StreamPath, rootConfigPath, StringComparison.OrdinalIgnoreCase) == 0) {
 260                                         SuppressAppReload (args.Start);
 261                                         if (args.Start) {
 262                                                 HttpApplicationFactory.DisableWatcher (VirtualPathUtility.RemoveTrailingSlash (HttpRuntime.AppDomainAppPath), "?eb.?onfig");
 263
 264                                                 lock (saveLocationsCacheLock) {
 265                                                         if (saveLocationsCache == null)
 266                                                                 saveLocationsCache = new Dictionary <string, DateTime> (StringComparer.Ordinal);
 267                                                         if (saveLocationsCache.ContainsKey (rootConfigPath))
 268                                                                 saveLocationsCache [rootConfigPath] = DateTime.Now;
 269                                                         else
 270                                                                 saveLocationsCache.Add (rootConfigPath, DateTime.Now);
 271
 272                                                         if (saveLocationsTimer == null)
 273                                                                 saveLocationsTimer = new Timer (ReenableWatcherOnConfigLocation,
 274                                                                                                 rootConfigPath,
 275                                                                                                 SAVE_LOCATIONS_CHECK_INTERVAL,
 276                                                                                                 SAVE_LOCATIONS_CHECK_INTERVAL);
 277                                                 }
 278                                         }
 279                                 }
 280                         }
 281                 }
 282
 283                 public static _Configuration OpenMachineConfiguration ()
 284                 {
 285                         return ConfigurationManager.OpenMachineConfiguration ();
 286                 }
 287
 288                 [MonoLimitation ("locationSubPath is not handled")]
 289                 public static _Configuration OpenMachineConfiguration (string locationSubPath)
 290                 {
 291                         return OpenMachineConfiguration ();
 292                 }
 293
 294                 [MonoLimitation("Mono does not support remote configuration")]
 295                 public static _Configuration OpenMachineConfiguration (string locationSubPath,
 296                                                                        string server)
 297                 {
 298                         if (server == null)
 299                                 return OpenMachineConfiguration (locationSubPath);
 300
 301                         throw new NotSupportedException ("Mono doesn't support remote configuration");
 302                 }
 303
 304                 [MonoLimitation("Mono does not support remote configuration")]
 305                 public static _Configuration OpenMachineConfiguration (string locationSubPath,
 306                                                                        string server,
 307                                                                        IntPtr userToken)
 308                 {
 309                         if (server == null)
 310                                 return OpenMachineConfiguration (locationSubPath);
 311                         throw new NotSupportedException ("Mono doesn't support remote configuration");
 312                 }
 313
 314                 [MonoLimitation("Mono does not support remote configuration")]
 315                 public static _Configuration OpenMachineConfiguration (string locationSubPath,
 316                                                                        string server,
 317                                                                        string userName,
 318                                                                        string password)
 319                 {
 320                         if (server == null)
 321                                 return OpenMachineConfiguration (locationSubPath);
 322                         throw new NotSupportedException ("Mono doesn't support remote configuration");
 323                 }
 324
 325                 public static _Configuration OpenWebConfiguration (string path)
 326                 {
 327                         return OpenWebConfiguration (path, null, null, null, null, null);
 328                 }
 329
 330                 public static _Configuration OpenWebConfiguration (string path, string site)
 331                 {
 332                         return OpenWebConfiguration (path, site, null, null, null, null);
 333                 }
 334
 335                 public static _Configuration OpenWebConfiguration (string path, string site, string locationSubPath)
 336                 {
 337                         return OpenWebConfiguration (path, site, locationSubPath, null, null, null);
 338                 }
 339
 340                 public static _Configuration OpenWebConfiguration (string path, string site, string locationSubPath, string server)
 341                 {
 342                         return OpenWebConfiguration (path, site, locationSubPath, server, null, null);
 343                 }
 344
 345                 public static _Configuration OpenWebConfiguration (string path, string site, string locationSubPath, string server, IntPtr userToken)
 346                 {
 347                         return OpenWebConfiguration (path, site, locationSubPath, server, null, null);
 348                 }
 349
 350                 public static _Configuration OpenWebConfiguration (string path, string site, string locationSubPath, string server, string userName, string password)
 351                 {
 352                         return OpenWebConfiguration (path, site, locationSubPath, server, null, null, false);
 353                 }
 354
 355                 static _Configuration OpenWebConfiguration (string path, string site, string locationSubPath, string server, string userName, string password, bool fweb)
 356                 {
 357                         if (String.IsNullOrEmpty (path))
 358                                 path = "/";
 359
 360                         bool inAnotherApp = false;
 361                         if (!fweb && !String.IsNullOrEmpty (path))
 362                                 path = FindWebConfig (path, out inAnotherApp);
 363
 364                         string confKey = path + site + locationSubPath + server + userName + password;
 365                         _Configuration conf = null;
 366                         conf = (_Configuration) configurations [confKey];
 367                         if (conf == null) {
 368                                 try {
 369                                         conf = ConfigurationFactory.Create (typeof (WebConfigurationHost), null, path, site, locationSubPath, server, userName, password, inAnotherApp);
 370                                         configurations [confKey] = conf;
 371                                 } catch (Exception ex) {
 372                                         lock (hasConfigErrorsLock) {
 373                                                 hasConfigErrors = true;
 374                                         }
 375                                         throw ex;
 376                                 }
 377                         }
 378                         return conf;
 379                 }
 380
 381                 public static _Configuration OpenMappedWebConfiguration (WebConfigurationFileMap fileMap, string path)
 382                 {
 383                         return ConfigurationFactory.Create (typeof(WebConfigurationHost), fileMap, path);
 384                 }
 385
 386                 public static _Configuration OpenMappedWebConfiguration (WebConfigurationFileMap fileMap, string path, string site)
 387                 {
 388                         return ConfigurationFactory.Create (typeof(WebConfigurationHost), fileMap, path, site);
 389                 }
 390
 391                 public static _Configuration OpenMappedWebConfiguration (WebConfigurationFileMap fileMap, string path, string site, string locationSubPath)
 392                 {
 393                         return ConfigurationFactory.Create (typeof(WebConfigurationHost), fileMap, path, site, locationSubPath);
 394                 }
 395
 396                 public static _Configuration OpenMappedMachineConfiguration (ConfigurationFileMap fileMap)
 397                 {
 398                         return ConfigurationFactory.Create (typeof(WebConfigurationHost), fileMap);
 399                 }
 400
 401                 public static _Configuration OpenMappedMachineConfiguration (ConfigurationFileMap fileMap,
 402                                                                              string locationSubPath)
 403                 {
 404                         return OpenMappedMachineConfiguration (fileMap);
 405                 }
 406
 407                 internal static object SafeGetSection (string sectionName, Type configSectionType)
 408                 {
 409                         try {
 410                                 return GetSection (sectionName);
 411                         } catch (Exception) {
 412                                 if (configSectionType != null)
 413                                         return Activator.CreateInstance (configSectionType);
 414                                 return null;
 415                         }
 416                 }
 417
 418                 internal static object SafeGetSection (string sectionName, string path, Type configSectionType)
 419                 {
 420                         try {
 421                                 return GetSection (sectionName, path);
 422                         } catch (Exception) {
 423                                 if (configSectionType != null)
 424                                         return Activator.CreateInstance (configSectionType);
 425                                 return null;
 426                         }
 427                 }
 428
 429                 public static object GetSection (string sectionName)
 430                 {
 431                         HttpContext context = HttpContext.Current;
 432                         return GetSection (sectionName, GetCurrentPath (context), context);
 433                 }
 434
 435                 public static object GetSection (string sectionName, string path)
 436                 {
 437                         return GetSection (sectionName, path, HttpContext.Current);
 438                 }
 439
 440                 static bool LookUpLocation (string relativePath, ref _Configuration defaultConfiguration)
 441                 {
 442                         if (String.IsNullOrEmpty (relativePath))
 443                                 return false;
 444
 445                         _Configuration cnew = defaultConfiguration.FindLocationConfiguration (relativePath, defaultConfiguration);
 446                         if (cnew == defaultConfiguration)
 447                                 return false;
 448
 449                         defaultConfiguration = cnew;
 450                         return true;
 451                 }
 452
 453                 internal static object GetSection (string sectionName, string path, HttpContext context)
 454                 {
 455                         if (String.IsNullOrEmpty (sectionName))
 456                                 return null;
 457
 458                         _Configuration c = OpenWebConfiguration (path, null, null, null, null, null, false);
 459                         string configPath = c.ConfigPath;
 460                         int baseCacheKey = 0;
 461                         int cacheKey;
 462                         bool pathPresent = !String.IsNullOrEmpty (path);
 463                         string locationPath = null;
 464
 465                         if (pathPresent)
 466                                 locationPath = "location_" + path;
 467
 468                         baseCacheKey = sectionName.GetHashCode ();
 469                         if (configPath != null)
 470                                 baseCacheKey ^= configPath.GetHashCode ();
 471
 472                         try {
 473                                 sectionCacheLock.EnterWriteLock ();
 474
 475                                 object o;
 476                                 if (pathPresent) {
 477                                         cacheKey = baseCacheKey ^ locationPath.GetHashCode ();
 478                                         if (sectionCache.TryGetValue (cacheKey, out o))
 479                                                 return o;
 480
 481                                         cacheKey = baseCacheKey ^ path.GetHashCode ();
 482                                         if (sectionCache.TryGetValue (cacheKey, out o))
 483                                                 return o;
 484                                 }
 485
 486                                 if (sectionCache.TryGetValue (baseCacheKey, out o))
 487                                         return o;
 488                         } finally {
 489                                 sectionCacheLock.ExitWriteLock ();
 490                         }
 491
 492                         string cachePath = null;
 493                         if (pathPresent) {
 494                                 string relPath;
 495
 496                                 if (VirtualPathUtility.IsRooted (path)) {
 497                                         if (path [0] == '~')
 498                                                 relPath = path.Length > 1 ? path.Substring (2) : String.Empty;
 499                                         else if (path [0] == '/')
 500                                                 relPath = path.Substring (1);
 501                                         else
 502                                                 relPath = path;
 503                                 } else
 504                                         relPath = path;
 505
 506                                 HttpRequest req = context != null ? context.Request : null;
 507                                 if (req != null) {
 508                                         string vdir = VirtualPathUtility.GetDirectory (req.PathNoValidation);
 509                                         if (vdir != null) {
 510                                                 vdir = vdir.TrimEnd (pathTrimChars);
 511                                                 if (String.Compare (c.ConfigPath, vdir, StringComparison.Ordinal) != 0 && LookUpLocation (vdir.Trim (pathTrimChars), ref c))
 512                                                         cachePath = path;
 513                                         }
 514                                 }
 515
 516                                 if (LookUpLocation (relPath, ref c))
 517                                         cachePath = locationPath;
 518                                 else
 519                                         cachePath = path;
 520                         }
 521
 522                         ConfigurationSection section = c.GetSection (sectionName);
 523                         if (section == null)
 524                                 return null;
 525
 526 #if TARGET_J2EE
 527                         object value = get_runtime_object.Invoke (section, new object [0]);
 528                         if (String.CompareOrdinal ("appSettings", sectionName) == 0) {
 529                                 NameValueCollection collection;
 530                                 collection = new KeyValueMergedCollection (HttpContext.Current, (NameValueCollection) value);
 531                                 value = collection;
 532                         }
 533 #else
 534 #if MONOWEB_DEP
 535                         object value = SettingsMappingManager.MapSection (get_runtime_object.Invoke (section, new object [0]));
 536 #else
 537                         object value = null;
 538 #endif
 539 #endif
 540                         if (cachePath != null)
 541                                 cacheKey = baseCacheKey ^ cachePath.GetHashCode ();
 542                         else
 543                                 cacheKey = baseCacheKey;
 544
 545                         AddSectionToCache (cacheKey, value);
 546                         return value;
 547                 }
 548
 549                 static string MapPath (HttpRequest req, string virtualPath)
 550                 {
 551                         if (req != null)
 552                                 return req.MapPath (virtualPath);
 553
 554                         string appRoot = HttpRuntime.AppDomainAppVirtualPath;
 555                         if (!String.IsNullOrEmpty (appRoot) && virtualPath.StartsWith (appRoot, StringComparison.Ordinal)) {
 556                                 if (String.Compare (virtualPath, appRoot, StringComparison.Ordinal) == 0)
 557                                         return HttpRuntime.AppDomainAppPath;
 558                                 return UrlUtils.Combine (HttpRuntime.AppDomainAppPath, virtualPath.Substring (appRoot.Length));
 559                         }
 560
 561                         return null;
 562                 }
 563
 564                 static string GetParentDir (string rootPath, string curPath)
 565                 {
 566                         int len = curPath.Length - 1;
 567                         if (len > 0 && curPath [len] == '/')
 568                                 curPath = curPath.Substring (0, len);
 569
 570                         if (String.Compare (curPath, rootPath, StringComparison.Ordinal) == 0)
 571                                 return null;
 572
 573                         int idx = curPath.LastIndexOf ('/');
 574                         if (idx == -1)
 575                                 return curPath;
 576
 577                         if (idx == 0)
 578                                 return "/";
 579
 580                         return curPath.Substring (0, idx);
 581                 }
 582
 583                 internal static string FindWebConfig (string path)
 584                 {
 585                         bool dummy;
 586
 587                         return FindWebConfig (path, out dummy);
 588                 }
 589
 590                 internal static string FindWebConfig (string path, out bool inAnotherApp)
 591                 {
 592                         inAnotherApp = false;
 593
 594                         if (String.IsNullOrEmpty (path))
 595                                 return path;
 596
 597                         if (HostingEnvironment.VirtualPathProvider != null) {
 598                                 if (HostingEnvironment.VirtualPathProvider.DirectoryExists (path))
 599                                         path = VirtualPathUtility.AppendTrailingSlash (path);
 600                         }
 601
 602
 603                         string rootPath = HttpRuntime.AppDomainAppVirtualPath;
 604                         ConfigPath curPath;
 605                         curPath = configPaths [path] as ConfigPath;
 606                         if (curPath != null) {
 607                                 inAnotherApp = curPath.InAnotherApp;
 608                                 return curPath.Path;
 609                         }
 610
 611                         HttpContext ctx = HttpContext.Current;
 612                         HttpRequest req = ctx != null ? ctx.Request : null;
 613                         string physPath = req != null ? VirtualPathUtility.AppendTrailingSlash (MapPath (req, path)) : null;
 614                         string appDomainPath = HttpRuntime.AppDomainAppPath;
 615
 616                         if (physPath != null && appDomainPath != null && !physPath.StartsWith (appDomainPath, StringComparison.Ordinal))
 617                                 inAnotherApp = true;
 618
 619                         string dir;
 620                         if (inAnotherApp || path [path.Length - 1] == '/')
 621                                 dir = path;
 622                         else {
 623                                 dir = VirtualPathUtility.GetDirectory (path, false);
 624                                 if (dir == null)
 625                                         return path;
 626                         }
 627
 628                         curPath = configPaths [dir] as ConfigPath;
 629                         if (curPath != null) {
 630                                 inAnotherApp = curPath.InAnotherApp;
 631                                 return curPath.Path;
 632                         }
 633
 634                         if (req == null)
 635                                 return path;
 636
 637                         curPath = new ConfigPath (path, inAnotherApp);
 638                         while (String.Compare (curPath.Path, rootPath, StringComparison.Ordinal) != 0) {
 639                                 physPath = MapPath (req, curPath.Path);
 640                                 if (physPath == null) {
 641                                         curPath.Path = rootPath;
 642                                         break;
 643                                 }
 644
 645                                 if (WebConfigurationHost.GetWebConfigFileName (physPath) != null)
 646                                         break;
 647
 648                                 curPath.Path = GetParentDir (rootPath, curPath.Path);
 649                                 if (curPath.Path == null || curPath.Path == "~") {
 650                                         curPath.Path = rootPath;
 651                                         break;
 652                                 }
 653                         }
 654
 655                         if (String.Compare (curPath.Path, path, StringComparison.Ordinal) != 0)
 656                                 configPaths [path] = curPath;
 657                         else
 658                                 configPaths [dir] = curPath;
 659
 660                         return curPath.Path;
 661                 }
 662
 663                 static string GetCurrentPath (HttpContext ctx)
 664                 {
 665                         HttpRequest req = ctx != null ? ctx.Request : null;
 666                         return req != null ? req.PathNoValidation : HttpRuntime.AppDomainAppVirtualPath;
 667                 }
 668
 669                 internal static bool SuppressAppReload (bool newValue)
 670                 {
 671                         bool ret;
 672
 673                         lock (suppressAppReloadLock) {
 674                                 ret = suppressAppReload;
 675                                 suppressAppReload = newValue;
 676                         }
 677
 678                         return ret;
 679                 }
 680
 681                 internal static void RemoveConfigurationFromCache (HttpContext ctx)
 682                 {
 683                         configurations.Remove (GetCurrentPath (ctx));
 684                 }
 685
 686 #if TARGET_J2EE || MONOWEB_DEP
 687                 readonly static MethodInfo get_runtime_object = typeof (ConfigurationSection).GetMethod ("GetRuntimeObject", BindingFlags.NonPublic | BindingFlags.Instance);
 688 #endif
 689
 690                 public static object GetWebApplicationSection (string sectionName)
 691                 {
 692                         HttpContext ctx = HttpContext.Current;
 693                         HttpRequest req = ctx != null ? ctx.Request : null;
 694                         string applicationPath = req != null ? req.ApplicationPath : null;
 695                         return GetSection (sectionName, String.IsNullOrEmpty (applicationPath) ? String.Empty : applicationPath);
 696                 }
 697
 698                 public static NameValueCollection AppSettings {
 699                         get { return ConfigurationManager.AppSettings; }
 700                 }
 701
 702                 public static ConnectionStringSettingsCollection ConnectionStrings {
 703                         get { return ConfigurationManager.ConnectionStrings; }
 704                 }
 705
 706                 internal static IInternalConfigConfigurationFactory ConfigurationFactory {
 707                         get { return configFactory; }
 708                 }
 709
 710                 static void AddSectionToCache (int key, object section)
 711                 {
 712                         object cachedSection;
 713
 714                         bool locked = false;
 715                         try {
 716                                 if (!sectionCacheLock.TryEnterWriteLock (SECTION_CACHE_LOCK_TIMEOUT))
 717                                         return;
 718                                 locked = true;
 719
 720                                 if (sectionCache.TryGetValue (key, out cachedSection) && cachedSection != null)
 721                                         return;
 722
 723                                 sectionCache.Add (key, section);
 724                         } finally {
 725                                 if (locked) {
 726                                         sectionCacheLock.ExitWriteLock ();
 727                                 }
 728                         }
 729                 }
 730
 731 #region stuff copied from WebConfigurationSettings
 732 #if TARGET_J2EE
 733                 static internal IConfigurationSystem oldConfig {
 734                         get {
 735                                 return (IConfigurationSystem)AppDomain.CurrentDomain.GetData("WebConfigurationManager.oldConfig");
 736                         }
 737                         set {
 738                                 AppDomain.CurrentDomain.SetData("WebConfigurationManager.oldConfig", value);
 739                         }
 740                 }
 741
 742                 static Web20DefaultConfig config {
 743                         get {
 744                                 return (Web20DefaultConfig) AppDomain.CurrentDomain.GetData ("Web20DefaultConfig.config");
 745                         }
 746                         set {
 747                                 AppDomain.CurrentDomain.SetData ("Web20DefaultConfig.config", value);
 748                         }
 749                 }
 750
 751                 static IInternalConfigSystem configSystem {
 752                         get {
 753                                 return (IInternalConfigSystem) AppDomain.CurrentDomain.GetData ("IInternalConfigSystem.configSystem");
 754                         }
 755                         set {
 756                                 AppDomain.CurrentDomain.SetData ("IInternalConfigSystem.configSystem", value);
 757                         }
 758                 }
 759 #else
 760                 static internal IConfigurationSystem oldConfig;
 761                 static Web20DefaultConfig config;
 762                 //static IInternalConfigSystem configSystem;
 763 #endif
 764                 const BindingFlags privStatic = BindingFlags.NonPublic | BindingFlags.Static;
 765                 static readonly object lockobj = new object ();
 766
 767                 internal static void Init ()
 768                 {
 769                         lock (lockobj) {
 770                                 if (config != null)
 771                                         return;
 772
 773                                 /* deal with the ConfigurationSettings stuff */
 774                                 {
 775                                         Web20DefaultConfig settings = Web20DefaultConfig.GetInstance ();
 776                                         Type t = typeof (ConfigurationSettings);
 777                                         MethodInfo changeConfig = t.GetMethod ("ChangeConfigurationSystem",
 778                                                                                privStatic);
 779
 780                                         if (changeConfig == null)
 781                                                 throw new ConfigurationException ("Cannot find method CCS");
 782
 783                                         object [] args = new object [] {settings};
 784                                         oldConfig = (IConfigurationSystem)changeConfig.Invoke (null, args);
 785                                         config = settings;
 786
 787                                         config.Init ();
 788                                 }
 789
 790                                 /* deal with the ConfigurationManager stuff */
 791                                 {
 792                                         HttpConfigurationSystem system = new HttpConfigurationSystem ();
 793                                         Type t = typeof (ConfigurationManager);
 794                                         MethodInfo changeConfig = t.GetMethod ("ChangeConfigurationSystem",
 795                                                                                privStatic);
 796
 797                                         if (changeConfig == null)
 798                                                 throw new ConfigurationException ("Cannot find method CCS");
 799
 800                                         object [] args = new object [] {system};
 801                                         changeConfig.Invoke (null, args);
 802                                         //configSystem = system;
 803                                 }
 804                         }
 805                 }
 806         }
 807
 808         class Web20DefaultConfig : IConfigurationSystem
 809         {
 810 #if TARGET_J2EE
 811                 static Web20DefaultConfig instance {
 812                         get {
 813                                 Web20DefaultConfig val = (Web20DefaultConfig)AppDomain.CurrentDomain.GetData("Web20DefaultConfig.instance");
 814                                 if (val == null) {
 815                                         val = new Web20DefaultConfig();
 816                                         AppDomain.CurrentDomain.SetData("Web20DefaultConfig.instance", val);
 817                                 }
 818                                 return val;
 819                         }
 820                         set {
 821                                 AppDomain.CurrentDomain.SetData("Web20DefaultConfig.instance", value);
 822                         }
 823                 }
 824 #else
 825                 static Web20DefaultConfig instance;
 826 #endif
 827
 828                 static Web20DefaultConfig ()
 829                 {
 830                         instance = new Web20DefaultConfig ();
 831                 }
 832
 833                 public static Web20DefaultConfig GetInstance ()
 834                 {
 835                         return instance;
 836                 }
 837
 838                 public object GetConfig (string sectionName)
 839                 {
 840                         object o = WebConfigurationManager.GetWebApplicationSection (sectionName);
 841
 842                         if (o == null || o is IgnoreSection) {
 843                                 /* this can happen when the section
 844                                  * handler doesn't subclass from
 845                                  * ConfigurationSection.  let's be
 846                                  * nice and try to load it using the
 847                                  * 1.x style routines in case there's
 848                                  * a 1.x section handler registered
 849                                  * for it.
 850                                  */
 851                                 object o1 = WebConfigurationManager.oldConfig.GetConfig (sectionName);
 852                                 if (o1 != null)
 853                                         return o1;
 854                         }
 855
 856                         return o;
 857                 }
 858
 859                 public void Init ()
 860                 {
 861                         // nothing. We need a context.
 862                 }
 863         }
 864 #endregion
 865 }
 866
 867 #endif